郭晓光,解海涛,刘旭贺,肖阳,姚玮.LZ91镁锂合金化学镀镍工艺[J].表面技术,2016,45(12):43-49.
GUO Xiao-guang,XIE Hai-tao,LIU Xu-he,XIAO Yang,YAO Wei.Electroless Nickel Plating Process of LZ91 Magnesium-Lithium Alloy[J].Surface Technology,2016,45(12):43-49
LZ91镁锂合金化学镀镍工艺
Electroless Nickel Plating Process of LZ91 Magnesium-Lithium Alloy
投稿时间:2016-02-15  修订日期:2016-12-20
DOI:10.16490/j.cnki.issn.1001-3660.2016.12.007
中文关键词:  镁锂合金  腐蚀  化学镀  自腐蚀电位  孔隙率  盐雾
英文关键词:Mg-Li alloy  corrosion  electroless plating  self-corrosion potential  porosity  salt spray
基金项目:国家自然科学基金资助项目(51371161);国家国际科技合作专项(2015DFR0020)
作者单位
郭晓光 1.郑州轻金属研究院 金属材料研究所,郑州 450041;2.郑州轻研合金科技有限公司,郑州 450041 
解海涛 1.郑州轻金属研究院 金属材料研究所,郑州 450041;2.郑州轻研合金科技有限公司,郑州 450041 
刘旭贺 1.郑州轻金属研究院 金属材料研究所,郑州 450041;2.郑州轻研合金科技有限公司,郑州 450041 
肖阳 1.郑州轻金属研究院 金属材料研究所,郑州 450041;2.郑州轻研合金科技有限公司,郑州 450041 
姚玮 郑州轻金属研究院 金属材料研究所,郑州 450041 
AuthorInstitution
GUO Xiao-guang 1.Zhengzhou Light Metals Research Institute of CHALCO, Zhengzhou 450041, China; 2.Zhengzhou Light Metals Research Institute for Alloy Technology, Zhengzhou 450041,China 
XIE Hai-tao 1.Zhengzhou Light Metals Research Institute of CHALCO, Zhengzhou 450041, China; 2.Zhengzhou Light Metals Research Institute for Alloy Technology, Zhengzhou 450041,China 
LIU Xu-he 1.Zhengzhou Light Metals Research Institute of CHALCO, Zhengzhou 450041, China; 2.Zhengzhou Light Metals Research Institute for Alloy Technology, Zhengzhou 450041,China 
XIAO Yang 1.Zhengzhou Light Metals Research Institute of CHALCO, Zhengzhou 450041, China; 2.Zhengzhou Light Metals Research Institute for Alloy Technology, Zhengzhou 450041,China 
YAO Wei Zhengzhou Light Metals Research Institute of CHALCO, Zhengzhou 450041, China 
摘要点击次数:
全文下载次数:
中文摘要:
      目的 为了改善LZ91镁锂合金的耐蚀性能,以扩大其适用范围。方法 在前期试验的基础上,通过正交实验探索不同镀镍配方及工艺对LZ91镁锂合金化学镀镍过程,及镍磷合金镀层形貌、孔隙率、自腐蚀电流密度等的影响。结果 优化工艺条件为:主盐乙酸镍20 g/L,还原剂次亚磷酸钠20 g/L,络合剂柠檬酸6 g/L,氟化氢铵20 g/L,氢氟酸12 mL/L,氨水少量,温度85 ℃,pH=7.4。采用优化后的工艺镀镍得到镀层的厚度为5~7 μm,表面孔隙率较低,自腐蚀电位为0.3806 V,较未处理Mg-Li合金正移1.356 V,自腐蚀电流密度为1.97×107 A/cm2,较未处理Mg-Li合金降低两了个数量级,96 h盐雾测试性能符合军工标准。结论 采用优化后工艺所得的镀层能够起到改善合金耐蚀性能的作用。
英文摘要:
      The work aims to improve corrosion resistance and expand application scope of LZ91 Mg-Li alloy. Based on pre-experiments, the effects of different formulations and processes of nickel plating on the process of electroless nickel plating, morphology, porosity, corrosion current density of Ni-P alloy coating were studied by means of orthogonal experiment. Optimized process conditions of nickel plating were confirmed: primary nickel acetate of 20 g/L, reducing hypophosphite of 20 g/L, complexing agent citric of 6 g/L, ammonium hydrogen fluoride of 20 g/L, hydrofluoric acid of 12 mL/L, a small amount of ammonia, temperature of 85 ℃ and pH=7.4. Admirable nickel coating was obtained in the optimized process conditions with the thickness of 5~7 μm, low surface porosity, self-corrosion potential of –0.3806 V (increased by 1.356 V compared with untreated Mg-Li alloy) and self corrosion current density of 1.97×10–7 A/cm2 (decreased by two orders of magnitudes). Owing to protection by the coating, the sample passed 96 h-salt spray test successfully and met military standards. Corrosion resistance of Mg-Li alloy can be improved by the coating made by taking advantage of optimized process.
查看全文  查看/发表评论  下载PDF阅读器
关闭

关于我们 | 联系我们 | 投诉建议 | 隐私保护 | 用户协议

您是第19991837位访问者    渝ICP备15012534号-3

版权所有:《表面技术》编辑部 2014 surface-techj.com, All Rights Reserved

邮编:400039 电话:023-68792193传真:023-68792396 Email: bmjs@surface-techj.com

渝公网安备 50010702501715号